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What time isit? Thatsimple question probably is asked more often today than ever. In our clock‐studded, cell‐phone society, the answer is never more than a glance away, and so we can blissfully partition our daysinto eversmaller incrementsfor ever more tightly scheduled tasks, confident that we will always know it is 7:03 P.M.
Modern scientific revelations about time, however, make the question endlessly frustrating. If we seek a precise knowledge of the time, the elusive infinitesimal of “now” dissolves into a scattering flock of nanoseconds. Bound by the speed of light and the velocity of nerve impulses, our perceptions of the present sketch the world as it was an instant ago—for all that our consciousness pretends otherwise, we can never catch up.
Even in principle, perfect synchronicity escapes us. Relativity dictates that, like a strange syrup, time flows slower on moving trains than in the stations and faster in the mountains than in the valleys. The time for our wristwatch or digital screen is not exactly the same as the time for our head.
Our intuitions are deeply paradoxical. Time heals all wounds, but it is also the great destroyer. Time is relative but also relentless. There is time for every purpose under heaven, but there is never enough.
Scientific American, October 24, 2014. Adaptado.
Genetic Fortune-Telling
One day, babies will get DNA report cards at birth. These
reports will offer predictions about their chances of suffering
a heart attack or cancer, of
getting hooked on tobacco,
and of being smarter than
average.
Though the new DNA tests offer probabilities, not diagnoses, they could greatly benefit medicine. For example, if women at high risk for breast cancer got more mammograms and those at low risk got fewer, those exams might catch more real cancers and set off fewer false alarms. The trouble is, the predictions are far from perfect. What if someone with a low risk score for cancer puts off being screened, and then develops cancer anyway? Polygenic scores are also controversial because they can predict any trait, not only diseases. For instance, they can now forecast about 10 percent of a person’s performance on IQ tests. But how will parents and educators use that information?
(Adaptado de Derek Brahney, Genetic Fortune-Telling. MIT Technology Review, Março/Abril 2018)
De acordo com o texto, um dos riscos do prognóstico
genético dos indivíduos desde o nascimento seria o de
Examine a tira.
A tira evidencia que